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Old 01-26-2011, 10:20 AM   #1
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grout width


is 1/2 inch grout size too large for 20x20 porcelain tile with heavily chiseled edges. The math works out well with room size but I am afraid the joint will become too wide as the grout fills in the chiseled edge.

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Old 01-26-2011, 10:24 AM   #2
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Thats too wide IMHO, I would be shooting for 3/16"-1/4"

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Old 01-26-2011, 10:31 AM   #3
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should grout be allowed to fill chiseled area of edge to the top of tile or just part way
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Old 01-26-2011, 10:36 AM   #4
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Work the grout, til you like what you see, I don't believe there are any set rules, I wouldn't let it come to high on the tile edge.
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Old 01-26-2011, 10:53 AM   #5
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any opinion on redgard over entire floor for crack isolation?
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Old 01-26-2011, 02:27 PM   #6
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So the subfloor is a slab? What condition? Have you checked how flat it is? Cracks? Control joints, expansion joints? How large an area? Where is the house?

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Old 01-26-2011, 05:14 PM   #7
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concrete slab 15x12, 20 year old settlement cracks that are not moving anymore. Used level quick last year and no new movement apparent.
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Old 01-26-2011, 08:13 PM   #8
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Well.....OK. You've convinced me your floor is is perfect shape for those huge tiles. You disregarded a few things...but OK.

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Old 01-26-2011, 10:30 PM   #9
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how perfect does the floor have to be for 24 x 24 tiles Jaz?
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Old 01-27-2011, 03:02 PM   #10
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For large tiles, to me anything close to or over 16" - the floor must be "within 1/8" in 10 ft. AND 1/16" in 12" of the required plane" This is especially necessary when the tiles are smooth and/or shiny, and if the edges are rectified.

The norm in the industry was lowered sometime ago from the 1/8" as above, to 1/4" in 10 ft......However that might be good enough for smaller tiles, not large ones. It was lowered because the cement workers thought the old spec was too stringent.

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Old 01-27-2011, 06:29 PM   #11
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Why can't thin set make up for small discrepancies ? Aren't the tiles not completely flat themselves?
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Old 01-27-2011, 07:29 PM   #12
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Quote:
Why can't thin set make up for small discrepancies ?
Yes, the thin set can make up for small discrepancies...like a dip that is 1/16". What do you do with a hump? Tiles will not bend much. Lippage is a characteristic of all tile installations. The amount is what we try to control.

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Aren't the tiles not completely flat themselves?
Heck no, they are not completely flat. Nor are many tiles completely square and the edges are not always straight. All tiles also have some warpage too. There's specs that address all this. Quality is one reason high quality tiles cost $3-6 and up, while you can find lots of choices under $2. Sometimes they some similar.

!/8" in 10 ft is not much, but you will see it once the floor is set.

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Last edited by JazMan; 01-27-2011 at 08:04 PM.
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Old 01-30-2011, 10:14 AM   #13
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Can direction arrows on the back of tiles be laid 180 degrees in opposite direction. Also, should tile patterns be pattern matched or just put them down randomly?
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Old 01-30-2011, 03:20 PM   #14
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Are the directional arrows there to help you with the pattern? You will have to lay them out first to see if you like the patterns as they are laying.

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